/* 弹幕容器 */
#danmaku-container {
    position: fixed;
    top: 10%;
    bottom: 20%; 
    left: 0;
    width: 100%;
    pointer-events: none;
    z-index: 100;
    overflow: hidden;
}

/* 单条弹幕样式 */
.danmaku-item {
    position: absolute;
    white-space: nowrap;
    padding: 8px 16px;
    border-radius: 20px;
    background-color: rgba(255, 255, 255, 0.85);
    color: #333;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
    will-change: transform, opacity;
    transform: translateZ(0);
    box-sizing: border-box;
    display: inline-flex;
    align-items: center;
    opacity: 0; /* 初始透明度由动画控制 */
    font-size: inherit; /* 确保文字大小可被JS控制 */
    top: 0;
}

/* 弹幕头像 */
.danmaku-avatar {
    border-radius: 50%;
    margin-right: 8px;
    vertical-align: middle;
    display: inline-block;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
    background-color: #f0f0f0;
    min-width: var(--avatar-size, 32px);
    min-height: var(--avatar-size, 32px);
    width: var(--avatar-size, 32px);
    height: var(--avatar-size, 32px);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

/* 弹幕作者 */
.danmaku-author {
    font-weight: 600;
    margin-right: 6px;
    color: #2c3e50;
    white-space: nowrap;
}

/* 弹幕内容 */
.danmaku-content {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    font-size: inherit; /* 继承父元素字体大小 */
}

/* 从右到左动画 */
@keyframes slideRight {
    0% {
        transform: translateX(100vw);
        opacity: 0;
    }
    10% {
        opacity: var(--danmaku-opacity, 1); /* 使用变量控制透明度 */
    }
    90% {
        opacity: var(--danmaku-opacity, 1);
    }
    100% {
        transform: translateX(-100%);
        opacity: 0;
    }
}

/* 从左到右动画 */
@keyframes slideLeft {
    0% {
        transform: translateX(-100%);
        opacity: 0;
    }
    10% {
        opacity: var(--danmaku-opacity, 1);
    }
    90% {
        opacity: var(--danmaku-opacity, 1);
    }
    100% {
        transform: translateX(100vw);
        opacity: 0;
    }
}

/* 激活动画的类 */
.danmaku-item.animate.right {
    animation: slideRight linear forwards;
}
.danmaku-item.animate.left {
    animation: slideLeft linear forwards;
}
@media screen and (max-width: 768px) {
    .danmaku-item {
        transform: scale(0.9);
        padding: 6px 12px;
    }

    .danmaku-avatar {
        --avatar-size: 24px;
        min-width: 24px;
        min-height: 24px;
        width: 24px;
        height: 24px;
    }

    .danmaku-author,
    .danmaku-content {
        font-size: inherit; /* 移除固定14px，继承父元素大小 */
    }
}

/* 打印时隐藏弹幕 */
@media print {
    #danmaku-container {
        display: none !important;
    }
}